杂质

Dopant distribution in LDD region is getting closer to substrate surface.

LDD区域中的杂质分布越来越靠近衬底表面。

The role of dopants and contaminants in degradation cannot be ignored.

杂质和污染对退化的作用不能忽视。

Since the fabrication of this sandwich stack is simple and not-introducing any new dopants, it is suitable for the application of semiconductor industry.

同时，因为具有制备简单，未引入新的杂质元素的特点，适宜于大规模工艺的应用。

Corundum dopped with impurity not only is cherished because of its beautiful appearance,but also is used in the fields such as electrotechnics, mechanism, laser, the optic apparatus and the underlay of semiconductor.

含有少量杂质的刚玉晶体(α-Al_2O_3)不仅由于其色泽艳丽成为人们珍爱的名贵宝石，而且由于它具有的优异性能，被广泛应用于电工、机械、激光器，光学器件和半导体衬底材料。

The comparison shows that dopping of carbon into GaN produces a significant yellow luminescence around 2.25 eV in PL spectra, and a characteristic excitation band due to C doped about 3.38～2.67 eV has also been observed in PLE spectra.

随着研究的深入，也为了获得更高性能的器件，在GaN材料中存在的一些固有问题(譬如黄带与杂质、缺陷的关系)越来越成为主要障碍，必须认真加以解决。

TOP ?(3.2.S.2.3): Specifications of starting materials do not include suitable limits for impurities (42% of dossiers).

缺陷③ （3.2.S.2.3）起始物料的质量标准未包含杂质的合适限度（申请文件的42%）。

The determination of high molecular weight impurities which existed in cefotaxime, ceftriaxone and ceftazidime and the influences of different ion-pair reagents; pH value of the eluants and the flow rate on the chromatographic column were discussed in detail.

以建立头孢噻肟、头孢曲松、头孢他啶中高分子杂质含量的快速测定方法为目的，对不同离子对试剂、洗脱剂pH、洗脱剂类型、离子对浓度、洗脱速度等因素进行了研究。

Scientists explain that the foam is created by impurities in the ocean, such as salts, chemicals, dead plants, decomposed fish and excretions from seaweed.

科学家解释说，泡沫是造成杂质在海洋，如盐，化学品，植物死亡，腐烂的鱼和排泄物从海藻。

Original design of vacuum furnaces for the three furnace feed valve sleeve, due to feed containing residue, impurities, often control valve block, and the temperatures are high, easily condensed to give instruments to bring a lot of work to maintain, in June 1998 will be 3-way feed to the rotary valve for FISHER, due to rotary valve has a strong distribution capacity to overcome these problems, operating normally.

原设计减压炉3炉进料为套筒阀，由于进料含有渣油、杂质，经常将控制阀堵住，且温度高、易凝结，给仪表维护带来大量的工作，1998年6月将3路进料该为FISHER旋转阀，由于旋转阀具有较强的流通能力，克服上述问题，运行正常。

On the other hand, fertilizer of CaHPCu is cheap and the high degree of purity (the content of P_2O_5 is 27 -30%)can improve phosphorus in soil, reduce production cost and promotes agricultural effectiveness. The content P in CaHPO_4 slow release in calcareous soil. Besides, the addition of HA activates phosphorus in CaHPO_4 and in soil, increases organics in soil, which promotes crops quality and yield.

一方面由于磷酸氢钙的纯度高，与过磷酸钙相比重金属等杂质含量较少，能有效减少对土壤及水体的污染；另一方面磷酸氢钙价格低廉，P_2O_5，含量可以达到27～30%，在石灰性土壤中本身就是一种缓效磷；腐植酸的添加，活化了磷酸氢钙中的枸溶磷，同时可能改善了土壤团粒结构，为作物优质、高产奠定了良好的基础。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。